Consequence Analysis of a Steam Generator Tube Rupture Accident
| Autor: | Chun-Fa Chuang, James M. Wu |
|---|---|
| Rok vydání: | 1984 |
| Předmět: |
Steam drum
Nuclear and High Energy Physics Chemistry 020209 energy Superheated steam Pressurized water reactor Boiler (power generation) food and beverages 02 engineering and technology Mechanics Condensed Matter Physics Flashing complex mixtures law.invention Coolant Nuclear physics 020303 mechanical engineering & transports 0203 mechanical engineering Nuclear Energy and Engineering law Nuclear power plant 0202 electrical engineering electronic engineering information engineering Relief valve |
| Zdroj: | Nuclear Technology. 67:381-406 |
| ISSN: | 1943-7471 0029-5450 |
| DOI: | 10.13182/nt84-a33496 |
| Popis: | A flashing droplet model was developed to examine the rupture flow of reactor coolant and its transport phenomena through the stream generator during a steam generator tube rupture accident. The model includes flashing flow; droplet formation; droplet removal by tube bundles, bubble scrubbing, steam separators, and steam dryers; and droplet size change by evaporation and condensation. The calculation follows the actual sequence of events during the accident. Those reactor coolant droplets escaping from the steam generator are used to estimate the radioactivity released into the environment. The steam generator tube rupture accident that occurred at the Prairie Island Plant on October 2, 1979, was studied using the model. The model estimated a release of 204 ..mu..Ci of /sup 131/I equivalent activity. The U.S. Nuclear Regulatory Commission estimated a 210-..mu..Ci release, assuming an iodine partition factor of 1/100 in the steam-generator. The model was also used to analyze a hypothetical steam generator tube rupture accident coupled with loss of off-site power in a large 1100-MW (electric) Westinghouse four-loop plant. The model estimated that 45 Ci of /sup 131/I equivalent activity could be released through the relief valves, which were stuck open for 30 min. The number is eight times higher thanmore » the estimate from the Westinghouse safety analysis report using a uniform mixing model.« less |
| Databáze: | OpenAIRE |
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